Today I knocked on my step-grandmas door, but she didn't answer. I knew where she kept the spare key, so I let myself in. I heard a radio playing in downstairs and when I went to see if she was there, I found her getting dressed in her bathroom. I loved seeing her dressed up in her bra and slip. She was smoking one of her long white cigarettes and for some reason it really turned me on. She saw me looking at her in the bathroom mirror and playfully scolded me for spying on her. I told her that I was just checking up on her and that made her feel good. She always said I was her favorite and she was very affectionate toward me. She noticed me checking her out and asked me if I like what I see. Well, of course I did, I always thought she was a sexy woman. She had quite a tan going which really stood out against her white underwear. She pulled her bra down a little to show me her tan lines and I suddenly reached up and grabbed her firm but saggy tit. To my surprise, she didn't seem to mind my touch and she encouraged me to take her in my arms. I pulled her into her bedroom where she stripped naked in front of me. She is only 5'0" tall and very petite. She started on another cigarette and my cock was aching to get out of my pants and into her sweet pussy. It was quite a while since she had been properly fucked by anyone, so she wanted to play first. We both enjoyed the foreplay but finally I couldn't wait any longer. I slid my cock into her hot wet pussy and banged the fuck out of her. Her tits were flopping up and down really hard as I was stroking cock into her. I finally busted a nut all over those big floppy tits of hers and we were both satisfied.